What went wrong at oil rig? A lot, probers find

A dolphin lies on dead on a beach on Horn Island,Miss., in the Gulf of Mexico, Tuesday, May 11, 2010. Officials say that at least six dead dolphins have been found on the Gulf Coast since May 2. Authorities don't know whether the animals died from the Oil in the Gulf. (AP Photo/Mike Stewart) (AP Photo/Mike Stewart)

May 12, 2010 2:53:15 PM PDT
Bad wiring and a leak in what's supposed to be a "blowout preventer." Sealing problems that may have allowed a methane eruption. Even a dead battery, of all things.